[2] As a junior, Gareth played for Longleaze School in Royal Wootton Bassett whose team won a National Tag Rugby tournament.
Capable of playing blindside flanker or number eight, he was a regular in the A League side and scored a notable try in James Simpson-Daniel's Testimonial game against Russia.
During his time in the academy he was also sent on loan to Hartpury College, gaining experience of playing men's rugby in National League 2 South for the 2011–12 season.
Performances for the academy saw him became a member of the first team squad for 2012–13, gaining some valuable first team experience, including playing in the Amlin Challenge Cup as well as another loan spell at Hartpury College where he scored 9 tries in just 8 appearances for the club during the later half of the 2012–13 National League 2 South season – including an incredible 5 tries in one match.
[9] Following the 2020–21 season Evans signed for Leicester Tigers on a short-term deal, starting in August 2021,[10] but retired in November without playing in a first team game.